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first equinoctial colure

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1. first equinoctial colure (uncountable) (astronomy) An imaginary line from pole-to-pole on the celestial sphere where the sun crosses it on March equinox. Source: ecdict

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first astronomy celestial colure crosses equinoctial equinox imaginary line march sphere sun

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first blush first cause first class First Council of Constantinople First Council of Lyons First Council of Nicaea first cousin first cranial nerve first degree first derivative first estate first floor

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